Explanation:

- Poignant: This word often describes something that evokes a keen sense of sadness or regret.

- Option 1: Quiet: While this can describe something calm or silent, it does not convey the emotional impact that "poignant" suggests.

- Option 2: Beautiful: Although it describes something pleasing to the senses or to the mind, it lacks the emotional depth often associated with "poignant."

- Option 3: Touching: This word captures the emotional resonance and could be considered a synonym for "poignant."

- Option 4: Happy: This is an emotion that is typically opposite to the sorrowful or touching quality of "poignant."

- Correct Answer is Option 3: Touching